Energy consumption limit per unit product of copper smelting enterprises

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The norm of energy consumption per unit products of copper metallurgical enterprise (draft for approval) 2007-12-03 Published 2008-06-01 Implemented by the People's Republic of China* * The General Administration of Quality Supervision, Inspection and Quarantine issued the China * * Standardization Management Committee GB 21248-2007 Preface Articles 4.1 and 4.2 of this standard are mandatory, and the rest are recommended. Appendix A and Appendix B of this standard are both informative appendices. From the date of implementation of this standard, YS/T101-2002 "Energy Consumption of Copper Smelting Enterprise Products" will be abolished. This standard is composed of * * Department of Resource Conservation and Environmental Protection, Development and Reform Commission, * * Proposed by the Industrial Department of the Standardization Management Committee and the China Nonferrous Metals Industry Association. This standard is under the jurisdiction of the National Nonferrous Metals Standardization Technical Committee. The unit responsible for drafting this standard: Jiangxi Copper Group Corporation, China Nonferrous Metals Industry Standard Metrology and Quality Research Institute. Units participating in the drafting of this standard: Daye Nonferrous Metals Company, Tongling Nonferrous Metals (Group) Company, Yunnan Copper Co., Ltd., and Jinchuan Group Co., Ltd. The main drafters of this standard: Zong Runtao, Wu Yiwei, Zhao Yongshan, Li Baodi, Tian Xiaopeng, Liang Jian, Gao Huaikun, Huang Jianping, Zhang Lin, Zhu Qibao, Wang Chengguo, Li Donglin, Lin Xiuying. GB 21248-2007 Energy consumption limit range of unit products of copper smelting enterprises. This standard specifies the technical requirements, statistical scope, calculation method, calculation scope and energy-saving management and measures for the energy consumption (hereinafter referred to as energy consumption) limit of products of copper smelting enterprises. This standard is applicable to the calculation and assessment of product energy consumption of copper smelting enterprises using copper concentrate, blister copper, and scrap copper as raw materials, as well as the energy consumption control of new projects. This standard does not apply to the direct heap leaching process of copper-containing ores, and the energy consumption indicators do not apply to the comprehensive recycling of copper-containing waste within the enterprise. Normative reference documents The provisions in the following documents become provisions of this standard through reference in this standard. For dated referenced documents, all subsequent amendments (excluding errata content) or revised editions do not apply to this standard. However, parties to an agreement based on this standard are encouraged to investigate whether the latest versions of these documents can be used. For undated referenced documents, the latest edition applies to this standard. GB/T 2589 General Principles for Comprehensive Energy Consumption Calculation GB 17167 General Principles for the Equipment and Management of Energy Measuring Instruments for Energy Consumption Units. 3 Terms, definitions and symbols The following terms, definitions and symbols apply to this standard. 3.1 Unit energy consumption in working procedure refers to the amount of energy consumed by the production unit of qualified products during the production process. 3.2 Unit object consumption in working procedure refers to the physical amount of energy consumed by the production unit of qualified products during the production process. 3.3 Unit energy consumption of technology refers to the amount of energy consumed by the production unit of qualified products during the process of production. 3.4 Assistant energy consumption The energy consumption of the auxiliary production system for product production. 3.5 Unit consumption of integrate energy refers to the comprehensive energy consumption per unit product, which refers to the sum of the unit consumption of process energy and the auxiliary energy consumption and loss allocation of process products. 4. Technical requirements 4.1 The energy consumption limit per unit product of existing copper smelting enterprises shall comply with the requirements in Table 1. Table 1 Copper smelting enterprise unit product energy consumption limit limit value Energy consumption limit limit value/process, process energy consumption ≤750 blister copper process (copper concentrate - blister copper) ≤800 anode copper process (copper concentrate - anode copper) ≤210 electrolysis process (anode copper - cathode copper) ≤900 copper smelting process (copper concentrate - cathode copper) - blister copper process (miscellaneous copper - blister copper) (miscellaneous copper - anode copper) - Anode copper process (blister copper - anode copper) - (miscellaneous copper - cathode copper) - copper refining process (blister copper - cathode copper) - Note 1: The waste heat recovered in each process and the waste heat power generation output should be deducted. 1 2 kgce/t Comprehensive energy consumption ≤800 ≤850 ≤220 ≤950 ≤340 ≤390 ≤300 ≤510 ≤420 GB 21248-2007 4.2 The admission value of energy consumption limit per unit product of new copper smelting enterprises The admission value of energy consumption limit per unit product of newly built copper smelting enterprises shall comply with the requirements of Table 2. Table 2 Energy consumption limit access value per unit product of copper smelting enterprises Energy consumption limit access value/kgce/t Process and process energy consumption Comprehensive energy consumption ≤500 ≤ 530 Blister copper process (copper concentrate - blister copper) ≤550 ≤ 580 anode copper process (copper concentrate - anode copper) ≤160 ≤ 170 electrolysis process (anode copper - cathode copper) ≤660≤700 Copper smelting process (copper concentrate - cathode copper) Blister copper process (miscellaneous copper - blister copper) - ≤300 Miscellaneous copper - anode copper - ≤350 Anodic copper process blister copper - anode copper - ≤280 Miscellaneous copper - cathode copper - ≤470 Copper refining process blister copper - cathode copper - ≤400 Note: The waste heat recovered in each process and the waste heat power generation output should be deducted. 4.3 Advanced value of energy consumption limit per unit product of copper smelting enterprises The advanced value of energy consumption limit per unit product of copper smelting enterprises should meet the requirements of Table 3. Table 3 Advanced value of energy consumption limit per unit product of copper smelting enterprises Advanced value of energy consumption limit Advanced value/kgce/t Process and process energy consumption Comprehensive energy consumption ≤330 ≤ 340 Blister copper process (copper concentrate - blister copper) ≤380 ≤ 390 Anode copper process (copper concentrate - anode copper) ≤120 ≤ 130 Electrolysis process (anode copper - cathode copper) ≤530≤550 Copper smelting process (copper concentrate - cathode copper) Blister copper process (miscellaneous copper - blister copper) - ≤230 Miscellaneous copper - anode copper - ≤290 Anodic copper process blister copper - anode copper - ≤230 Miscellaneous copper - cathode copper - ≤400 Copper refining process blister copper - cathode copper - ≤350 Note: The waste heat recovered in each process and the waste heat power generation output should be deducted. 5 Statistical Scope, Calculation Method and Calculation Scope 5.1 Statistical Scope 5.1.1 Actual (production) consumption of various energies by enterprises The various energies actually consumed by enterprises refer to the various energies used for production activities. it includes: Energy consumed by primary energy (raw coal, crude oil, natural gas, etc.), secondary energy (such as electricity, heat, petroleum products, coke, gas, etc.) and energy-consuming working fluids (water, oxygen, compressed air, etc.) used in production. It is mainly used in production systems, auxiliary production systems and ancillary production systems ； Excludes domestic energy consumption and energy consumption from approved infrastructure projects. In the actual energy consumed by the enterprise, the energy used as raw materials must also be included. Daily life energy refers to the energy used in dormitories, schools, culture and entertainment, medical care, business services, and child care and education within the enterprise system. 5.1.2 The physical fuel consumption and energy consumption within the enterprise’s planned statistical period The calculation of the physical consumption of a certain type of fuel within the enterprise’s planned statistical period should comply with formula (1): eh=e1+e2-e3-e4-e5 ……………………………………………………………… (1) In the formula: eh──Enterprise’s physical fuel consumption ； e1──The physical amount of fuel purchased by the enterprise ； e2──physical quantity of fuel in inventory at the beginning of the period ； e3──physical quantity of fuel exported ； e4──The physical quantity of fuel used in daily life ； e5──Amount of energy used in corporate engineering construction. GB 21248-2007 The calculation of energy consumption during the enterprise's planned statistical period should comply with formula (2): E =E1＋E2－E3－E4－E5 ……………………………………………………………… (2) =EZG+EZF =EZZ Where: E──Enterprise consumption during the planned statistical period ； E1──Purchased energy amount ； E2──increase or decrease in inventory energy ； E3──Amount of energy exported ； E4──Amount of energy used in daily life ； E5──Amount of energy used in corporate engineering construction ； EZG──Energy consumption of various product processes ； EZF──Energy consumption and losses in indirect auxiliary production departments ； EZZ──Comprehensive energy consumption of various products. All types of energy consumed shall not be recalculated or omitted. When there is a supply and demand relationship, the input and output sides should be consistent in the calculated values. The energy consumption of equipment shutdown and overhaul should also be included in the calculation, and be evenly distributed on a monthly basis according to the operation cycle of the equipment after the overhaul. The calculation of the enterprise's comprehensive energy consumption is carried out in accordance with the provisions of GB/T 2589. 5.1.3 Measurement of physical energy quantities The measurement of physical energy quantities must comply with the provisions of the Measurement Law of the People's Republic of China and GB/T 17167. 5.1.4 Measurement units of various energy sources: Enterprise production energy consumption, product process energy consumption (or product direct comprehensive energy consumption), and product comprehensive energy consumption units: kgce, tce (kilogram standard coal, ton standard coal) 4 units of coal, coke, heavy oil: kg, t, 10 t (kilogram, ton, ten thousand tons) 4 units of electricity: kW·h, 10 kW·h (kilowatt hours, ten thousand kilowatt hours) Unit of steam: kg, t or kJ, GJ (kilogram, ton or kilojoule, million kilojoules) 343 Units of gas, compressed air, and oxygen: m, 10 m (cubic meters, ten thousand cubic meters) 4 units of water: t, 10 t (tons, 10,000 tons) 5.1.5 Various energy sources (including energy consumed in the production of energy-consuming working fluids) The standard coal amount conversion method is based on the fuel with a low (bit) calorific value equal to 29.3076MJ (megajoules), called 1 kg standard coal. For purchased fuel energy, the actual measured low (level) calorific value or the actual measured value provided by the supplier can be used as the basis for calculation, or * * For the conversion coefficient conversion of the statistics department, see Appendix A. Secondary energy and energy-consuming working fluids are converted according to the corresponding energy value.: When an enterprise converts energy to self-production, the amount of standard coal is converted according to the actual physical amount of energy input. ； When supplied for export by a centralized production unit, its energy and other values ​​must be stipulated by the competent department. ； When purchasing for export, the energy and other values ​​must be the same. ； When the value such as energy is not provided, you can press * * For the conversion coefficients of the statistics department, see Appendix B. The waste heat recovered by the enterprise is based on the conversion coefficient of heat, and the waste heat power generation is uniformly based on the conversion coefficient of electricity. 5.1.6 Regulations on unit product energy consumption and product output To calculate the unit product energy consumption in the smelting and blowing processes, the qualified blister copper output produced within the same planned statistical period should be used ； To calculate the energy consumption per unit product of the fire refining process, the qualified anode copper output produced within the same planned statistical period should be used ； To calculate the energy consumption per unit product of the electrolytic refining process, the qualified cathode copper output produced within the same planned statistical period should be used. All product outputs are based on data officially reported by the enterprise planning and statistics department. 5.1.7 Calculation Principles for Energy Consumption of Waste Heat Utilization The waste heat recovered by enterprises belongs to energy saving recycling and does not belong to purchased energy. When calculating energy, double calculation with purchased energy should be avoided. The energy used by the waste heat utilization device is included in the energy consumption. The part of energy recovered for self-use shall be included in the self-use process ； When transferred to other processes, normal consumption will be included in the process used. ； The recovered energy, after being converted into standard coal, should be deducted in the process and process of recovering waste heat. If the energy consumption index does not deduct the waste heat recovery, it should be marked with the words "waste heat power generation without deducting" (or "waste heat power generation included", "waste heat recovery without deducting", etc.). ) 5.1.8 The energy consumption of other indirect auxiliary and ancillary production systems and the loss of energy and energy-consuming working fluids in the internal storage, conversion, distribution, supply and export of the enterprise, that is, indirect comprehensive energy consumption, should be allocated to each product according to the proportion of each product's process energy consumption to the enterprise's production process energy consumption. 5.2 Calculation method 5.2.1 Calculation of the physical unit consumption of the process (process) The physical unit consumption of the process (process) is calculated according to formula (3): GB 21248-2007 ES = MS ……………………………………………………………… (3) PZ Where: Es - the physical unit consumption of a certain process (process), in kilograms per ton (kg/t), kilowatt hours per ton (kW h/t), cubic meters per ton (m /t) ； Ms - the total physical amount of a certain energy directly consumed by a certain process (process), kilogram (kg), kilowatt hour (kW·h), cubic meter (m) ； . PZ——The total amount of qualified products (blister copper, anode copper, cathode copper) produced by a certain process (process), in tons (t) 5.2.2 Calculation of unit energy consumption of process (process) The unit energy consumption of process (process) is calculated according to formula (4): EI = EH ………………………………………………… (4) PZ where: EI——Unit energy consumption of a certain process (process), unit is kilograms of standard coal per ton, (kgce/t) ； EH - the sum of the physical amounts of various energy directly consumed by a certain process (process) converted into standard coal, the unit is kilograms of standard coal (kgce) ； . PZ——The total amount of qualified products (blister copper, anode copper, cathode copper) produced by a certain process (process), in tons (t) Note: The sum of the physical amounts of various energy directly consumed by this process and converted into standard coal amount is the algebraic sum. When waste heat recovery is included, it shall be handled according to Article 5.1.7. This avoids double counting of waste heat recovery and purchased energy. 5.2.3 Calculation of comprehensive energy consumption per process (process) The comprehensive energy consumption per process (process) is calculated according to Equation (5): EZ= EI + EF…………………………………………(5) where: EZ——The comprehensive energy consumption of a certain product, the unit is kilograms of standard coal per ton, (kgce/t) ； (kgce/t) ； EI——Unit energy consumption of a certain product process (process), in kilograms of standard coal per ton, EF——Indirect auxiliary energy consumption and loss allocation of a certain product, in kilograms of standard coal per ton, (kgce/t). 5.3 Calculation scope 5.3.1 Blister copper energy consumption 5.3.1.1 Smelting process 5.3.1.1 .1 The energy consumption calculation of the smelting process product ranges from the concentrate silo to the output of matte, including the various energy consumed by material preparation (drying, sintering, briquetting, material transportation), oxygen production, smelting furnace, depletion furnace and related supporting systems (fans, dust collection, waste heat recovery, circulating water...). 5.3.1.1 .2 Calculation of the physical unit consumption and energy consumption of the smelting process. The physical unit consumption of the smelting process is calculated with reference to Equation (3), and the energy unit consumption of the smelting process is calculated with reference to Equation (4). The energy consumption of this process is being calculated: When waste heat recovery is included, it shall be handled in accordance with Article 5.1.7. The calculation of energy consumption of other processes and processes is also handled according to this principle. The physical unit consumption of copper and gold mixed smelting is calculated according to formula (6): E RZ − E HR = MJ ⋅ E RZ MZ PC ……………………………… (6) where: EHR - the physical unit consumption of copper in the mixed smelting process of copper and gold, in kilograms per ton (kg/t), kilowatt hours per ton 3 ； (kW·h/t), cubic meter per ton (m/t) ERZ - the total amount of a certain energy directly consumed by the process, in kilograms (kg), kilowatt hours (kW·h), cubic meters 3 ； (m) MJ——the amount of gold concentrate fed into the furnace, in tons (t) ； ； MZ - the total amount of concentrate fed into the furnace, in tons (t) PC - the output of qualified blister copper, in tons (t). The total amount of concentrate entering the furnace includes copper concentrate, gold concentrate (containing gold nuggets), gold and silver-containing materials, lead matte, etc., excluding flux and returned products of this system. Amount of gold concentrate fed into the furnace: Including the total amount of gold concentrate, gold nuggets, and gold and silver-containing materials put into the smelting furnace. GB 21248-2007 5.3.1.2 Blowing process 5.3.1.2 .1 The energy consumption calculation range of the products in the blowing process starts from matte to the output of blister copper. include: Various amounts of energy consumed by ladle cranes, converters or other converting furnaces and related supporting systems (fans, feeders, converting furnace ancillary equipment, slag casting machines, waste heat recovery, dust collection...). 5.3.1.2 .2 Calculation of physical unit consumption and energy consumption in the blowing process. The physical unit consumption in the blowing process is calculated with reference to Equation (3), and the energy consumption in the blowing process is calculated with reference to Equation (4). 5.3.1.3 Melting and blowing continuous process 5.3.1.3 .1 The calculation range of product energy consumption for the continuous process of smelting and blowing starts from the concentrate bin to the output of blister copper. include: Various amounts of energy consumed by material preparation, oxygen production, smelting, blowing furnaces and related supporting systems. 5.3.1.3 .2 Calculation of physical unit consumption and process energy consumption in the continuous process of melting and blowing. The physical unit consumption in the continuous process of melting and blowing is calculated with reference to Equation (3), and the energy consumption in the continuous process of melting and blowing is calculated with reference to Equation (4). 5.3.1.4 Energy consumption of blister copper process (copper concentrate - blister copper) 5.3.1.4 .1 Calculation scope of energy consumption of blister copper process products Energy consumption of blister copper process products includes smelting process, blowing process or smelting and blowing continuous process and direct auxiliary energy consumption allocation within workshops and branches. 5.3.1.4 .2 The physical unit consumption of blister copper process is calculated according to formula (3) ； The energy consumption of the blister copper process is calculated according to Equation (4). 5.3.1.4 .3 The comprehensive energy consumption of blister copper is calculated with reference to Equation (5). 5.3.2 Anode copper energy consumption 5.3.2.1 Fire refining process 5.3.2.1 .1 Calculation range of energy consumption of products from pyro-refining process The calculation range of energy consumption of products from pyro-refining process includes: Various amounts of energy consumed by refining furnaces, casting machines and related supporting systems (fans, dust collection, waste heat recovery...). 5.3.2.1 .2 Calculation of the physical unit consumption and process energy consumption of the pyrometallurgical refining process (also known as the physical unit consumption and process energy unit consumption of the anode copper process). The physical unit consumption of the pyrometallurgical refining process is calculated with reference to Equation (3), and the energy consumption of the pyrometallurgical refining process is calculated with reference to Equation (4). 5.3.2.1 .3 The comprehensive energy consumption of the fire refining process is calculated based on the principles of the comprehensive energy consumption calculation method for blister copper. 5.3.2.2 Energy consumption of anode copper process (copper concentrate-anode copper) 5.3.2.2 .1 The calculation scope of the energy consumption of anode copper process products includes the smelting process, the blowing process or the continuous smelting and blowing process, the fire refining process and the direct auxiliary energy consumption allocation within the workshop and branch factory. 5.3.2.2 .2 The actual unit consumption of the anode copper process is calculated according to formula (3). The unit energy consumption of the anode copper process is calculated according to formula (4). The comprehensive energy consumption of anode copper is calculated according to formula (5). 5.3.3 Energy consumption of copper cathode 5.3.3.1 Electrolytic refining process 5.3.3.1 .1 Calculation range of energy consumption of electrolytic refining process products Calculation range of energy consumption of electrolytic refining process products includes: Various amounts of energy consumed by electrolysis, liquid purification and related supporting systems (transformer rectifier, crane, electrolysis special unit, electrolyte circulation heating, insulation, seed board production, fans, air conditioning...). in: When calculating the energy consumption of the clean liquid, the energy consumption of open circuit products (copper sulfate, etc.) should be deducted. When the energy consumption measurement of open-circuit products is incomplete, the deduction amount shall not exceed 30% of the total energy consumption of the clean liquid. 5.3.3.1 .2 The electricity consumption of the electrolysis process (or the electricity consumption of the cathode copper process) is calculated according to formula (3). 5.3.3.1 .3 For copper, gold (silver) mixed smelting enterprises, the power consumption calculation method for the cathode copper process in the electrolysis process should comply with the provisions of Table 4. Table 4 Calculation method of cathode copper power consumption in the electrolysis process of copper and gold (silver) mixed smelting enterprises Electrolysis process cathode copper power consumption (kW·h) Anode copper gold content 22 (g/t) Dk≤290A/mDk>290A/m 50Q×(100-1.0)%Q×(100-1.0)% 100Q×(100-4.0)%Q×(100-4.0)% 150Q×(100-13.5)%Q×(100-14.2)% 200Q×(100-21.0)%Q×(100-22.0)% 250Q×(100-25.0)%Q×(100-27.5)% Note 1: When the gold content of the anode copper is between the values ​​listed in the table, the electricity consumption of the cathode copper in the electrolysis process is determined by the interpolation method. Note 2: Q is the total AC power consumption in the electrolytic refining process. Dk is the electrolysis current density. Note 3: The silver content of the anode copper is not considered. GB 21248-2007 5.3.3.1 .4 The unit steam consumption in the electrolysis process (or the unit steam consumption in the cathode copper process) is calculated according to formula (3). Note: The steam enthalpy is calculated based on 98.1kpa saturated steam. 5.3.3.1 .5 The comparable steam unit consumption of the electrolysis process is corrected according to equation (7) according to the temperature and altitude of different regions.: EEQ = SQ…………………………………………(7) K⋅H where: EQ - Comparable steam consumption in the electrolysis process, in kilograms per ton (kg/t) ； (kg/t) ； ESQ——Unit steam consumption in electrolysis process, unit is kilogram per ton (K——Regional temperature correction coefficient: Take 1.0 for the south of the Yangtze River, 1.03 for the north of the Yangtze River and south of Shanhaiguan, and 1.09 for the north of Shanhaiguan. ； H——height correction coefficient: For altitudes above 1500m, take 1.03. 5.3.3.1 .6 The energy consumption of the electrolysis process (or the energy consumption of the cathode copper process) is calculated with reference to Equation (4) ； The comprehensive energy consumption of the electrolysis process is calculated with reference to Equation (5). 5.3.3.2 Energy consumption of copper cathode smelting (copper concentrate-copper cathode) 5.3.3.2 .1 The calculation scope of the energy consumption of cathode copper smelting process products includes the smelting process, blowing process or continuous smelting and blowing process, pyro-refining process, electrolytic refining process and direct auxiliary energy consumption allocation within workshops and branches. 5.3.3.2 .2 The energy consumption of the copper smelting process is calculated with reference to Equation (4). 5.3.3.2 .3 The energy consumption of comparable copper smelting processes is calculated according to formula (8): CJCY + EJ ⋅+ ED ……………………（8） CC ⋅ R JCJ ⋅ RY Where: EK——Comparable process energy consumption of copper smelting, unit is kilogram of standard coal per ton (kgce/t) ； EC——Unit energy consumption of blister copper process, unit is kilogram of standard coal per ton (kgce/t) ； CJ——anode copper grade ； CC - crude copper grade ； RJ——Recovery rate of fire refining process ； EJ——Energy consumption of the fire refining process, the unit is kilograms of standard coal per ton (kgce/t) ； CY——cathode copper grade ； RY——Cathode copper direct yield ； . ED——Unit energy consumption of electrolysis process, unit is kilograms of standard coal per ton (kgce/t) 5.3.3.2 .3 The comprehensive energy consumption of copper smelting is calculated with reference to Equation (5). EK = EC ⋅ 5.3.4 Copper refining (crude, miscellaneous copper - cathode copper) energy consumption 5.3.4.1 Energy consumption of blister copper process (miscellaneous copper - blister copper) The physical unit consumption, process energy consumption and comprehensive energy consumption of the process of producing blister copper from miscellaneous copper are calculated with reference to similar indicators of energy consumption of blister copper (copper concentrate - blister copper). 5.3.4.2 The energy consumption of the anode copper process (miscellaneous copper, blister copper - anode copper) is rough, and the physical unit consumption, process energy consumption and comprehensive energy consumption of the anode copper process produced from miscellaneous copper are calculated with reference to similar indicators of anode copper (copper concentrate - anode copper) energy consumption. 5.3.4.3 Energy consumption of cathode copper refining process (miscellaneous copper, blister copper - cathode copper) 5.3.4.3 .1 The energy consumption of the cathode copper refining process is calculated with reference to Equation (4) ； The comprehensive energy consumption of copper refining is calculated with reference to Equation (5). 5.3.4.3 .2 The comparable energy consumption of the cathode copper refining process is calculated according to formula (9): EKJ = E YJ ⋅ CY + ED CJ ⋅ RY ……………………………………………(9) ； in the formula: EKJ - Comparable energy consumption of copper refining process, unit is kilogram of standard coal per ton (kgce/t) EYJ - Unit energy consumption of anode copper production process from crude and miscellaneous copper, unit is kilogram of standard coal per ton (kgce/t) ； ； ED——Energy consumption of the electrolysis process, unit is kilograms of standard coal per ton (kgce/t) CY——Cathode copper grade ； CJ——anode copper grade ； RY——Cathode copper direct yield. GB 21248-2007 6 Energy-saving management and measures 6.1 Basic energy-saving management 6.1.1 Enterprises should establish an energy-saving assessment system, regularly assess the energy consumption of each production process of copper smelting enterprises, and break down the assessment indicators to each grassroots unit. 6.1.2 Enterprises should establish an energy consumption statistics system as required, establish documents and archives of energy consumption calculations and statistical results, and conduct controlled management of documents. 6.1.3 Enterprises should be equipped with corresponding energy measurement instruments and establish an energy measurement management system in accordance with the requirements of GB 17167. 6.2 Energy-saving technology management 6.2.1 Copper smelting enterprises should be equipped with energy-saving equipment such as waste heat recovery to maximize the utilization of recyclable energy in the production process. 6.2.2 Copper smelting enterprises should carry out technological transformation, adopt advanced technology, and improve production efficiency and energy utilization. 6.2.3 Copper smelting enterprises should organize production rationally, reduce intermediate environments, improve production capacity, and extend production cycles. 6.2.4 Copper smelting enterprises should vigorously develop circular economy, make use of existing technologies, and rationally utilize waste copper and other renewable resources. GB 21248-2007 Appendix A (informative appendix) Table A of the current reference standard coal conversion coefficients of commonly used energy types. Current reference standard coal conversion coefficients of commonly used energy types. Energy conversion standard coal coefficients and unit average low calorific value coefficient. Unit 20908 kJ/kg (5000 kcal/kg) 0.714 3kgce/kg 26344 kJ/kg (6300 kcal/kg) 0.900kgce/kg 41816 kJ/kg (10000 kcal/kg) 1.4286kgce/kg 42652 kJ/kg (10200 kcal/kg) 1.4571kgce/kg 43070 kJ/kg (10300 kcal/kg) 1.4714kgce/kg 28435 kJ/kg (6800kcal/kg) (ash content 13.5%) 0.9714kgce/kg 50179 kJ/kg (12000 kcal/kg) 1.7143kgce/kg 3600 kJ/kW·h (860 kcal/ kW·h) 0.1229kgce/(kW·h) ---- 1 250×4.186 8kJ/m3 3 3 Variety Raw coal Cleaned coal Heavy oil Diesel Gasoline Coke Liquefied petroleum gas Electricity (equivalent value) Thermal gas Natural gas 0.03412 1.786 kgce/MJ tce/10 m 43 33 38931 kJ/m (9310 kcal/m ) 1.3300tce/10 m Note 1: The steam conversion coefficient to standard coal is based on calorific value. Note 2: Some varieties still use "10,000" as the unit of measurement. Note 3: If the standard coal conversion coefficient in this appendix is * * If the regulations of the statistical department change, the energy consumption level indicators should be set separately. Appendix B (informative appendix) Energy equivalent reference value table B of energy-consuming working fluids Commonly used energy-consuming working fluids Energy equivalent value Energy equivalent value Name Liquid name Fresh water Softened water Compressed air Carbon dioxide Oxygen Nitrogen Acetylene Solid carbide Unit Ton cubic meters cubic meters cubic meters cubic meters kilograms Calorific value MJ Megajoule) (7.5350 14.2347 1.1723 6.2806 11.7230 11.7230 19.6771 243.6722 60.9188 kgce of standard coal (kg of standard coal) 0.2571 0.4857 0.0400 0.2143 0.4000 0.4000 0.6714 8.3143 2.0786 Remarks No. 1 2 3 4 5 6 7 8 refers to tap water that has not been used. Gas is calculated based on the average power consumption. When it is a by-product, it is calculated based on the power consumption. When it is the main product, it is calculated based on the average consumption of coke, electricity, etc. Note: The energy and other values ​​in this appendix are subject to change. * * The latest data released by the statistics department shall prevail.